2016-10-27_REVISION - C1981041

• Permit No: C1981041
• IBM Index Class Name: Revision
• Doc Date: 10/27/2016
• From: James A. Beckwith Attorney & Councelor at Law
• To: DRMS
• Type & Sequence: TR69
• Email Name: BFB
• Email Name: DIH
• Media Type: D
• Archive: No

Information Circular 9947
Surface Subsidence Over a Room -
and -Pillar Mine in the Western
United States
By Jett A. Magers
UNITED STATES DEPARTMENT OF THE INTERIOR
Bruce Babbitt, Secretary
BUREAU OF MINES